Buggy code:
public class JdomProjectReader extends JdomReader implements ProjectReader { public static final VersionRange INTERACTIVESPACES_VERSION_RANGE_DEFAULT = new VersionRange ( new Version ( 1 , 0 , 0 ) , new Version ( 2 , 0 , 0 ) , false ) ; public static final String PROJECT_ELEMENT_NAME_PROJECT = "project" ; public static final String GROUP_ELEMENT_NAME = "projects" ; public static final String PROJECT_VALUE_TRUE = "true" ; public static final String PROJECT_VALUE_FALSE = "false" ; public static final String PROJECT_ELEMENT_NAME_NAME = "name" ; public static final String PROJECT_ELEMENT_NAME_DESCRIPTION = "description" ; public static final String PROJECT_ELEMENT_NAME_IDENTIFYING_NAME = "identifyingName" ; private static final String PROJECT_ATTRIBUTE_NAME_PROJECT_TYPE = "type" ; public static final String PROJECT_ATTRIBUTE_NAME_PROJECT_BUILDER = "builder" ; public static final String PROJECT_ATTRIBUTE_NAME_PROJECT_INTERACTIVE_SPACES_VERSION = "interactiveSpacesVersion" ; public static final String PROJECT_ELEMENT_NAME_VERSION = "version" ; public static final String PROJECT_ELEMENT_NAME_BASE_DIRECTORY = "baseDirectory" ; private static final String PROJECT_ELEMENT_RESOURCES_NAME = "resources" ; private static final String PROJECT_ELEMENT_NAME_SOURCES = "sources" ; private static final String PROJECT_ELEMENT_NAME_METADATA = "metadata" ; private static final String PROJECT_ELEMENT_NAME_METADATA_ITEM = "item" ; private static final String PROJECT_ATTRIBUTE_NAME_METADATA_ITEM_NAME = "name" ; private static final String PROJECT_ELEMENT_NAME_DEPENDENCIES = "dependencies" ; private static final String PROJECT_ELEMENT_NAME_DEPENDENCY_ITEM = "dependency" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_IDENTIFYING_NAME = "identifyingName" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_IDENTIFYING_NAME_DEPRECATED = "name" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION = "version" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION_MINIMUM = "minimumVersion" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION_MAXIMUM = "maximumVersion" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_REQUIRED = "required" ; private static final String PROJECT_ATTRIBUTE_VALUE_DEFAULT_DEPENDENCY_ITEM_REQUIRED = JdomProjectReader . PROJECT_VALUE_TRUE ; private static final String PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_DYNAMIC = "dynamic" ; private static final String PROJECT_ATTRIBUTE_VALUE_DEFAULT_DEPENDENCY_ITEM_DYNAMIC = JdomProjectReader . PROJECT_VALUE_FALSE ; private static final String PROJECT_ELEMENT_NAME_DEPLOYMENTS = "deployments" ; private static final String PROJECT_ELEMENT_NAME_DEPLOYMENT_ITEM = "deployment" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPLOYMENT_ITEM_TYPE = "type" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPLOYMENT_ITEM_METHOD = "method" ; private static final String PROJECT_ATTRIBUTE_NAME_DEPLOYMENT_ITEM_LOCATION = "location" ; private static final String PROJECT_ELEMENT_NAME_CONFIGURATION = "configuration" ; private static final String PROJECT_ATTRIBUTE_NAME_CONFIGURATION_ITEM_NAME = "name" ; public JdomProjectReader ( InteractiveSpacesWorkbench workbench ) { } @ Override public Project readProject ( File projectFile ) { } Project makeProjectFromElement ( Element projectElement ) { } private void processPrototypeChain ( Project project , Namespace projectNamespace , Element projectElement ) { } private void configureProjectFromElement ( Project project , Namespace projectNamespace , Element projectElement ) { } private String getProjectType ( Element rootElement ) { } private void getMainData ( Project project , Namespace projectNamespace , Element rootElement ) { } private void getProjectAttributes ( Project project , Element rootElement ) { } private void getMetadata ( Project project , Namespace projectNamespace , Element rootElement ) { } private void getConfiguration ( Project project , Namespace projectNamespace , Element rootElement ) { } private void getDependencies ( Project project , Namespace projectNamespace , Element rootElement ) { } private ProjectDependency getDependency ( Element dependencyElement ) { String identifyingName = getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_IDENTIFYING_NAME ) ; if ( identifyingName == null ) { identifyingName = getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_IDENTIFYING_NAME_DEPRECATED ) ; if ( identifyingName == null ) { addError ( "Dependency<seq2seq4repair_space>has<seq2seq4repair_space>no<seq2seq4repair_space>identifying<seq2seq4repair_space>name" ) ; return null ; } } VersionRange version = null ; String versionStr = getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION ) ; if ( versionStr != null ) { version = VersionRange . parseVersionRange ( versionStr ) ; } else { String minimumVersionStr = getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION_MINIMUM ) ; String maximumVersionStr = getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_VERSION_MAXIMUM ) ; if ( minimumVersionStr != null ) { if ( maximumVersionStr == null ) { maximumVersionStr = minimumVersionStr ; } } else if ( maximumVersionStr != null ) { minimumVersionStr = maximumVersionStr ; } else { addError ( "Dependency<seq2seq4repair_space>has<seq2seq4repair_space>no<seq2seq4repair_space>version<seq2seq4repair_space>constraints" ) ; return null ; } <START_BUG> version = VersionRange . parseVersionRange ( minimumVersionStr , minimumVersionStr ) ; <END_BUG> } boolean required = JdomProjectReader . PROJECT_VALUE_TRUE . equals ( getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_REQUIRED , JdomProjectReader . PROJECT_ATTRIBUTE_VALUE_DEFAULT_DEPENDENCY_ITEM_REQUIRED ) ) ; boolean dynamic = JdomProjectReader . PROJECT_VALUE_TRUE . equals ( getAttributeValue ( dependencyElement , JdomProjectReader . PROJECT_ATTRIBUTE_NAME_DEPENDENCY_ITEM_DYNAMIC , JdomProjectReader . PROJECT_ATTRIBUTE_VALUE_DEFAULT_DEPENDENCY_ITEM_DYNAMIC ) ) ; ProjectDependency dependency = new ProjectDependency ( ) ; dependency . setIdentifyingName ( identifyingName ) ; dependency . setVersionRange ( version ) ; dependency . setRequired ( required ) ; dependency . setDynamic ( dynamic ) ; return dependency ; } private void getDeployments ( Project project , Namespace projectNamespace , Element rootElement ) { } private ProjectDeployment getDeployment ( Element deploymentElement ) { } }

Fix:
version = VersionRange . parseVersionRange ( minimumVersionStr , maximumVersionStr ) ;